Meet the Artemis II crew and learn how NASA’s 10-day lunar flyby mission will test deep space systems and pave the way for future Moon landings.
Category: space – Page 21
Helical liquid crystals can flip light’s chirality under ultralow electric fields
The direction in which the electromagnetic field of circularly polarized light rotates can be easily reversed by applying a voltage, RIKEN researchers have demonstrated. This could enable a new generation of optical devices based on circularly polarized light. The work is published in two papers in the journal Advanced Materials.
Polarized sunglasses produce light that is polarized along a single direction. But some special devices can generate light with a polarization that rotates as the light propagates. Such circularly polarized light is useful for many applications, including spectroscopy, satellite communications, stereoscopy and microscopy.
For some applications, it would be useful to switch between clockwise and anticlockwise circularly polarized light. However, this handedness is locked into the molecular structure. Known as the material’s chirality, it is used to produce the circularly polarized light. And reversing that requires a lot of energy.
US firm flies hypersonic system that captures images through plasma layer
Varda Space Industries has launched its sixth reentry capsule aboard SpaceX’s Transporter-16 mission.
The capsule launched aboard a Falcon 9 rocket from Vandenberg Space Force Base, California, at 4:02 am PT (11:02 am UTC). It carried a US government-funded hypersonic technology experiment within its interior.
The payload was designed to test a hypersonic navigation system capable of accurately identifying spacecraft position, even when communications are blocked by intense plasma sheaths during hypersonic flight.
Cosmic collision of galaxies mapped by Maunakea telescope
An astronomer at the University of Hawaiʻi at Hilo is using data from the Canada–France–Hawaiʻi Telescope (CFHT) on Maunakea to help reconstruct a slow-motion cosmic collision, one that has been unfolding for hundreds of millions of years. A new study from principal investigator R. Pierre Martin, a professor of astronomy at UH Hilo, and international researchers such as Ph.D. student Camille Poitras and colleagues at Université Laval in Québec, Canada, simulates the past, present, and future of two spiral galaxies, NGC 2207 and IC 2163.
Artemis II live updates: Crew enters high Earth orbit, NASA says they are in ‘great spirits’
Artemis II will make history, taking astronauts around the moon for the first time in more than 50 years. The four-person crew will launch from NASA’s Kennedy Space Center on Merritt Island, Florida, for a 10-day journey.
The trip will pave the way for future Artemis missions intended to eventually see astronauts set foot on the moon, and the building of a permanent lunar base.
Read more here about what you need to know regarding the Artemis II mission, including how long it will take, who the astronauts are and how to watch.
The 2022 JEPA is essentially the 1992 PMAX
Yann LeCun said:
BREAKING: Schmidhuber claims to have invented JEPA in 1992!
Is anyone surprised?
At some point, when I have nothing better to do, I’ll write a piece about what it means to invent something.
Speaking of which, one day, when I was still in high school, I wrote f(x)=0.
Every theory, every algorithm, is a special case of this (with proper definitions for f and x).
Every technology is a practical application of it.